An apparatus and method supplies lubricating fluid to an oil lubricating fluid receiving port of a mechanical device. The power module is partitioned into at least two portions and fixedly contacted, through a heat radiation part, with a housing cover, and heat radiation fins are arranged on an outer surface of the housing cover where the power module is disposed. The voice recognition system also includes a settled result input means for receiving settlement information on the primary or secondary voice recognition result and a dictionary content control means for updating said recognition dictionary based on the settlement information. An insulating cover surrounds the generator, the engine and the fuel tank.